Blacklists Compared

5 January 2013

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]

Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the hostkarma.junkemailfilter.com (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
31855(total number of IP addresses tested, including 143 at SDSC)
27794(union of most IP zones)
21279b.barracudacentral.org
20674l2.apews.org
19971zen.spamhaus.org (union of all results)
19108zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19105cbl.abuseat.org
18547ip.v4bl.org
18161bl.tiopan.com
15529hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14807dnsbl-1.uceprotect.net
14542bl.mailspike.net (union of all results)
14000hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
12911spam.dnsbl.sorbs.net
12274zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
11140bl.mailspike.net (result 127.0.0.12 = bad reputation)
11114ubl.unsubscore.com
10502db.wpbl.info
10018psbl.surriel.com
9862dnsbl.inps.de
9423dnsbl.sorbs.net (union of all results)
8373dnsbl-2.uceprotect.net
8091all.spamrats.com (union of all results)
7442dnsbl-3.uceprotect.net
6586bl.spameatingmonkey.net
6586wl.mailspike.net (union of all results) (not a blacklist!)
5898list.dnswl.org (not a blacklist!)
5338truncate.gbudb.net
5057dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
4440wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4217all.spamrats.com (result 127.0.0.36 = dialup)
3974bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3788bl.spamcop.net
3555all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3127free.v4bl.org
3102ips.backscatterer.org
3089dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3052dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2408ix.dnsbl.manitu.net
2380hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2268hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2136hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2134bl.score.senderscore.com
1909zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1821bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1791wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1372hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1114zen.spamhaus.org (union of SBL and SBLCSS results)
1038bl.spamcannibal.org
714accredit.habeas.com (not a blacklist!)
700zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
623spamsources.fabel.dk
568query.bondedsender.org (not a blacklist!)
557korea.services.net
414zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
356all.spamrats.com (result 127.0.0.38 = spam source)
310tr.countries.nerd.dk
271all.s5h.net
236wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
233l2.bbfh.ext.sorbs.net
225mail-abuse.blacklist.jippg.org
194iadb.isipp.com (not a blacklist!)
125dnsbl.njabl.org (union of all results)
124hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
122dnsbl.ahbl.org (union of all results)
119wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
95dnsbl.ahbl.org (result 127.0.0.4 = spam source)
93iadb2.isipp.com (not a blacklist!)
88dnsbl.njabl.org (result 127.0.0.9 = open proxy)
43bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
35tor.dnsbl.sectoor.de (union of all results)
24dnsbl.njabl.org (result 127.0.0.2 = open relay)
17dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
17dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
17dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
14dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
13dnsbl.njabl.org (result 127.0.0.4 = spam source)
13dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
11multi.surbl.org
7spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3dnsbl-0.uceprotect.net
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1multi.uribl.com (union of all results)
1swl.spamhaus.org (union of all results) (not a blacklist!)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
31855(total number of IP addresses whose names were tested, including 143 at SDSC)
17073hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13333hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4629l1.apews.org
2293hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2042hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1930(union of most domain zones)
793hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
428hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
409hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
365dbl.spamhaus.org (result 127.0.1.2 = spam source)
365dbl.spamhaus.org (union of all results)
146hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
124hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
119urired.spameatingmonkey.net
54multi.uribl.com (result 127.0.0.2 = spam resource)
54multi.uribl.com (union of all results)
36multi.surbl.org
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
23rhsbl.ahbl.org
22fresh.spameatingmonkey.net
20dob.sibl.support-intelligence.net
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
22435(total number of domains tested, including 89 at SDSC)
20190hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3632hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2804(union of most domain zones)
1897hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1806dbl.spamhaus.org (union of all results)
1801dbl.spamhaus.org (result 127.0.1.2 = spam source)
1750hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1706hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1355multi.surbl.org
1007multi.uribl.com (union of all results)
993multi.uribl.com (result 127.0.0.2 = spam resource)
979urired.spameatingmonkey.net
936hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
704l1.apews.org
448dob.sibl.support-intelligence.net
392fresh.spameatingmonkey.net
300hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
91hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
20rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 January 2013.